<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'

const animationDuration = 6000

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '500px'
    },
		chartData: {
		  type: Object,
		  required: true
		}
  },
  data() {
    return {
      chart: null
    }
  },
  watch: {
  	chartData: {
  		deep: true,
  		handler(val) {
  			this.setOptions(val)
  		}
  	}
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')
	  this.setOptions(this.chartData)
    },
	setOptions({dayData,actualData,titleData,nameData} = {}) {
		this.chart.setOption({
			title: {
			    text:titleData 
			},
			tooltip: {
				trigger: 'axis',
				axisPointer: { // 坐标轴指示器，坐标轴触发有效
					type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
				}
			},
			grid: {
				top: 50,
				left: '2%',
				right: '2%',
				bottom: '3%',
				containLabel: true
			},
			xAxis: [{
				type: 'category',
				data: dayData,
				axisTick: {
					alignWithLabel: true
				}
			}],
			yAxis: [{
				type: 'value',
				axisTick: {
					show: false
				}
			}],
			series: [{
				name: nameData,
				type: 'bar',
				stack: 'vistors',
				barWidth: '20%',
				data: actualData,
				animationDuration
			}]
		})
	}
  }
}
</script>
